I came across this finger print scanner made by ada fruit http://www.adafruit.com/products/751#Description I thought it would be a fun project to hook this up to the starter of my car. I know that this isn't an ensured security for my car but it would be a cool gimmick.
I was thinking I just need to interrupt the 12v power that is sent to the starter when the key is starting the car with a relay and have whichever pin I choose to be HIGH while the scanner is working to be the trigger for the relay.
So I basically need a 12v 60-80amp relay that can be triggered by 5v.
Please let me know if I have this all wrong and if you have a relay suggestion for my project. Thanks in advance and I apologize for the newbie question.